BIOL 203 Microbiology LCC Final Exam 2025-2026
Verified Questions %100% detailed Answers
This acid-fast, rod shaped bacterium typically infects the
lungs of humans because it is aerobic and requires a high
concentration of oxygen. Due to its acid fast cell which
allows few things inside, it is very hard to treat with
antimicrobials. A treatment course can last from months to
years. Noncompliance with treatment is common and has
led to the spread of multidrug and extreme drug resistant
strains. - ANSWER-Mycobacterium tuberculosis
This gram-negative bacterium is a rod shaped
coccobacillus carried by fleas. The fleas don't typically bite
humans, but the bacterium blocks their throat preventing
blood from reaching their stomachs. In this state of
perpetual hunger, they will bite anything that is near. Each
,time they bite, they regurgitate some of their stomach
contents (and the bacterium) into the new host. Infected
humans may develop black, necrotic lymph nodes visible
through the skin giving this disease the nickname, "The
Black Plague." - ANSWER-Yersinia pestis
This gram-negative, coccus shaped bacterium is typically
found in pairs called diplococci. It causes serious infection
of the brain and spinal cord. It is considered fastidious and
often grown on Chocolate Agar (agar that includes cooked
blood.) There is a vaccine that is highly recommended for
college students living in dorms. - ANSWER-Neisseria
meningitidis
This gram-negative, coccobacilli bacterium infects the
respiratory system and causes a very serious disease,
Whooping Cough, in infants and young children. The
,name comes from the gasp of air, these children take in
after a prolonged coughing fit. Adults may also become
infected (and transmit the bacterium), but due to their
more mature respiratory system, the disease presents as
a normal, but prolonged cough without the "whoop." It can
be prevented with the TDaP or DTaP vaccination. -
ANSWER-Bordetella pertussis
This gram-positive, cocci shaped bacterium is often found
in clusters. It is a common member of the normal flora of
30% of humans, but can cause a range of skin infections
under the right circumstances. It is resistant to many
antibiotics leaving us with few options for treatment.
Vancomycin is the current drug used to treat it, but since
1996, strains resistant to vancomycin have appeared. -
ANSWER-Staphylococcus aureus
, This gram-positive, rod shaped bacterium is able to form
spores. These spores can be found in the gastrointestinal
tract of many humans. When the gut is healthy (home to
normal microbiota members in sufficient numbers), the
spores stay dormant. When the normal microbiota
numbers are drastically reduced, typically following use of
a broad spectrum antibiotic, the spores become vegetative
and cause diarrhea. Because antibiotics often make this
infection worse rather than better, new treatment options
like fecal transplants are being explored. - ANSWER-
Clostridium difficile
This gram-negative, rod shaped bacterium is typically
found in water and soil. It is considered an opportunistic
infection and can infect the lungs of cystic fibrosis patients
and burn victims. It is resistant to many antibiotics. It can
Verified Questions %100% detailed Answers
This acid-fast, rod shaped bacterium typically infects the
lungs of humans because it is aerobic and requires a high
concentration of oxygen. Due to its acid fast cell which
allows few things inside, it is very hard to treat with
antimicrobials. A treatment course can last from months to
years. Noncompliance with treatment is common and has
led to the spread of multidrug and extreme drug resistant
strains. - ANSWER-Mycobacterium tuberculosis
This gram-negative bacterium is a rod shaped
coccobacillus carried by fleas. The fleas don't typically bite
humans, but the bacterium blocks their throat preventing
blood from reaching their stomachs. In this state of
perpetual hunger, they will bite anything that is near. Each
,time they bite, they regurgitate some of their stomach
contents (and the bacterium) into the new host. Infected
humans may develop black, necrotic lymph nodes visible
through the skin giving this disease the nickname, "The
Black Plague." - ANSWER-Yersinia pestis
This gram-negative, coccus shaped bacterium is typically
found in pairs called diplococci. It causes serious infection
of the brain and spinal cord. It is considered fastidious and
often grown on Chocolate Agar (agar that includes cooked
blood.) There is a vaccine that is highly recommended for
college students living in dorms. - ANSWER-Neisseria
meningitidis
This gram-negative, coccobacilli bacterium infects the
respiratory system and causes a very serious disease,
Whooping Cough, in infants and young children. The
,name comes from the gasp of air, these children take in
after a prolonged coughing fit. Adults may also become
infected (and transmit the bacterium), but due to their
more mature respiratory system, the disease presents as
a normal, but prolonged cough without the "whoop." It can
be prevented with the TDaP or DTaP vaccination. -
ANSWER-Bordetella pertussis
This gram-positive, cocci shaped bacterium is often found
in clusters. It is a common member of the normal flora of
30% of humans, but can cause a range of skin infections
under the right circumstances. It is resistant to many
antibiotics leaving us with few options for treatment.
Vancomycin is the current drug used to treat it, but since
1996, strains resistant to vancomycin have appeared. -
ANSWER-Staphylococcus aureus
, This gram-positive, rod shaped bacterium is able to form
spores. These spores can be found in the gastrointestinal
tract of many humans. When the gut is healthy (home to
normal microbiota members in sufficient numbers), the
spores stay dormant. When the normal microbiota
numbers are drastically reduced, typically following use of
a broad spectrum antibiotic, the spores become vegetative
and cause diarrhea. Because antibiotics often make this
infection worse rather than better, new treatment options
like fecal transplants are being explored. - ANSWER-
Clostridium difficile
This gram-negative, rod shaped bacterium is typically
found in water and soil. It is considered an opportunistic
infection and can infect the lungs of cystic fibrosis patients
and burn victims. It is resistant to many antibiotics. It can
